After subtotal hysterectomy, there is usually no menstruation. To understand this issue, it is important to understand the principle of menstruation. Normally, under the action of estrogen and progesterone secreted by the ovaries, the endometrium is subjected to cyclic growth and corresponding exfoliation, resulting in the onset of menstruation. Since the uterine body has disappeared after subtotal hysterectomy, menstruation will stop. However, at this time, because the hysterectomy is a subtotal hysterectomy, the cervix is still present and there is some small amount of cervical canal mucosa. Due to the stimulation of the ovaries, if it is still in a normal non-menopausal state, the cervical canal mucosa may be stimulated by the cyclic estrogen and there may be cyclic small amount of vaginal bleeding.